Carbureter.



E. G. STAUDE.

CARBURETER.

APPUCATION FILED OCTv 10'. 1914.

1,297,506, Patented Mar. 18,1919.

/ fl3 46 I 4 A 1 AN!!! 6 HER! Zzwenov Edwz'n fi faude, y PM '2 EDWIN G. STAUDE, 0F MINN'EAIOLIS, MINNESOTA, ASSIGNOR 'IO E. G. STAUBE MANU- FACTURING COMEAN'Y, OF ST. PAUL, MINNESOTA, A CORPORATION OF MINNESOTA.

CARBURETER.

Specification of Letters Patent.

Application filed October 10, 1914. Serial No. 866,152.

the same with the proper portion of air to form such ombustible charge.

Thedevices ordinarily employed for this purpose, depending for their operation upon the suction produced by the down strokes of v the engine pistons, areincapable of securing,

at all times, a uniform mixture since the variations in the speed of the engine produce varying degrees of suction. Further-- more,'in such devices, there is no certainty that the atomization of the liquid fuel will be carried out uniformly, since the conditions controlling the same, such for instance as the temperature and density of the atmosphere, and the specific gravity of the fuel,-

are subject to wide variation.

The present invention aims to overcome the above mentioned disadvantages common to atomizers and carburetors, by the provision of positive means for insuring the maintenance of an exact roportion between the amount of fuel atomlzed and the amount of air used in forming the combustible mixture regardless of whether the engine is opcrating at a high or a low speed. Furthermore, 1t is proposed to accomplish the atomization for all conditions of operation at a tension.- A further object is to provide such uniform pressure, unafl'ected bythe speed of the engine, thereby insuring a spray of even a device adaptable to the atomization of fuels of diflerent specific gravity without reuiring any special adjustment: Other and further objects will appear from the follow-- ing description and the claims annexed thereto, reference being had to the accompanying drawings, in which- Figure 1 is an end view of the combined carburetor and atomizer embodying my in.- vention.

ply tank, not shown.

Fig. 5 is an enlarged detail sectional view of one of the spraying plugs, and

Fig. 6 is a section on the line 66 of Fig. 5.

Similar reference characters refer to similar parts in the different figures.

Referring to the drawings, the numeral 1.

represents a tubular member containing an air passage, having an elbow 2 supplied with .a suitable flange 3 which is adapted to be fastened to the inlet manifold of an internal combustion engine. lVithin said passage is a suitable butterfly valve 4: of usual construction which is mounted on a shaft 5. A

thin boss 6, on the under side of member 1 has secured thereto, by means of screws 7, an annular flange 8 carried at the upper end of an elongated tubular member 9. Said member 9 preferably consists of an upper bearing port on 10, a lower bearing portion 11, and an intermediate open or skeleton connecting porti n 12. A shaft 13 having a valve 14 secured to its upper end is disposed in suitable bearings in said portions 10 and 11, and is adapted to be rotated by means of a :pulley 15, to which power is applied from any suitable source, preferably the internal combustion engine, not shown, which is supplied with explosive mixture from the carbureter.

The valve 14 is seated within a suitable recess 16 of the member 9, with its upper surface flush with flange 8, and its periphery is formed with a plurality of equidistant pockets 17. Extending radially outward from'the recess 16 are a plurality of equiliatented Mar. 18, 1919.

distant passages 18, with the inner ends of which the valve pockets 1? register, as sald valve is rotated, as shown in Fig. 4. Said passages 18 open at their outer ends into a common annular fuel chamber 19 connected by apipe 20 with the fuel sup- Alternating with 831d passages 18 the upper portion of the member 9 is formed with an annular series of equidistant vertical holes 21, which are connected with the valve recess'16 by short ports 22. Seated in said holes 21 are the upper ends of vertically movable plunger r0ds'23, which. find bearings at their lower ends in holes 24 formed inthe lower bearing portion 11- of member 9. Intermediate' their ends said plunger rods have secured thereto collars 25, between the under sides of' which and the bearing'portion 11 are disposed springs 26 surrounding said rods and serving 1 to yieldingly maintain them at their limit of upward vertical movement. 7

The shaft 13 has splined thereto, between the bearing portions 10 and 11, a sleeve 27, which is capable of longitudinal movement thereon. A collar 28, loosely carried within anannular recess-29 of said sleeve, so as to permit rotation of-said sleeve' with respect to the collar by shaft 13, is employed to impart longitudinal movement to the sleeve, said collar having oppositely. extending arms 30 apertured to permit the free passage of two of the plunger rods 23 therethrough,

as shown in Fig. 3.

The ends of arms 30 are secured to a yoke formed by curved arms 31 carried by a rock shaft 32 which is journaled in lateral projections-33 of the intermediate skeleton portion 12 of the member -9. A lever 34, secured to said rock shaft, carries-near its upper end a block 35, which is capable. of longitudinal adjustment, lengthwise of saidlever, by

means of a screw 36 carried .by said lever; A pin 37, carried bysaid block,-is disposed within an elongated slot 38 in an arm 39, which is secured to and depends from one end of the shaft -5 of the butterfly valve 4. The other end of shaft 5 carries a suitable throttle lever 40, which is connected with the usual control devices, not shown, foroperating the butterfly valve. The construction abovedescribed insures the downward movement of the sleeve 27 in direct proportion to the amount of opening movement imparted to the valve 4, as will be readily apparent.

The surface of the sleeve 27 is formed with an inclined cam surface 41, designed for cooperation with the collars 25 on the plunger rods 23. In the rotation of said sleeve, by reasonof its splined connection with shaft 13, said cam surface is successively effective,

with respect to said collars, to depress said valve, the cam surface 41 is operative 'in depressing the. several plunger rods 23, the

distance through which the cam surface is operative. being dependent upon the position assumed by the sleeve 27 in response to the movement of the butterfly valve, as previously set forth. I

During a single rotation of the shaft 13,

the rods are successively carried to their limits of downward'movement by the cam and, thereafter, the lower 'end 42 of said cam surface moves" out of contact with the collar 25, permitting each rod to move successively upwardly under the influence of its spring 26. The parts are so proportioned and timed that the cam 'moves out of en gagement with the collar 25 of each plunger rod just after the maximum space created above said plunger rod has been filled with liquid fuel from the passage thereacross of one of the valve pockets 17. It will be understood, in this connection, that each pocket 17, immediately preceding its movement in registration with the ports 22, has had its fuel supply replenished to the maximum capacity by registration with one of the passages 18. I

' Immediately above the open upper end of each plunger rod hole'21, the tubular member 1 carries a sprayer 43, preferably consisting ofa'hollow plug 44, having a restricted opening 45 at its upper end, as shown in Fig. 5. A bullet shaped plug 46, having longitudinal surface grooves 47 is screwthreaded within the interior of plug 44, its

opening 45. to allow for the convergence of the grooves 47 at or near this point.

The upward 'movement of each plunger rod 23, under the influence of its spring 26, forcibly projects the superposed liquid fuel in theupper end of its hole'21, through the several grooves 47 of the associated sprayer 43, causing the violent impingement of a lurality of sprays at a common center ad- ]acent the restricted opening 45. The fuel charge is thereby broken up into a fine mist or va or as it passes into the air passage 1,

thus acilitating the carburation of the air in said passage. To permit access to the sprayers 43, a removable section 48 is provided in the air passage.

The operation of the device is clear from Fig. 2, where, the butterfly valve 4 being closed, the sleeve 27 is at the upward limit of its movement; it follows, therefore, that the cam 41 isnot in a position to operate upon the plunger rods 23. However,.when the sleeve 27 is lowered, by the opening of valve 4, the collars 25 on rods 23 are brought under the influence of cam 41,.to a greater or less extent, as determined b the amount which the sleeve 27 is lowere The rotation of the cam 41 gradually retracts the plunger rods, successively, by forcing down 100 upper end being spaced slightly from the ne ates the collars 25, until each collar, successively drops ofi? the end 42 of said cam, and thereupon returns sharply, under the action of its spring 26, to the position shown in Fig. 2, thus accomplishing the injection of the liquid fuel as above described.

It is to be noted that the transfer of the liquid fuel into the holes 21 by the pockets 17 of the valve is effected When the pressure of the fuel supply, prevailing in the chamber 19 has been cut off, so that there can be nooverfloW or leakage of fuel into the air passage, to produce too rich a mixture. To prevent the leakage of the liquid fuel, suitable stuflingboxes 49 are provided for each of the rods 23 and for the shaft 13.

The construction herein shown is best adapted to the needs of a four cylinder engine, the parts being so timed as to insure the measuring and injecting action successively for each of the c linders. By driving the shaft 13 fifty per cent faster, the construction will adapt itself to a six cylinder engine. Or, as Will be apparent, the number of plunger rods may be increased or diminished, to conform to the number of engine cylinders.

T heinjection of the fuel into the sprayers 43 is always accomplished under substantially the same pressure, Whether the engine be running fast or slow, since such action is merely contingent upon movement of the cam surface collar 25 of a plunger rod 23. Consequently, the starting of the engine does not require rapid spinning, or a choking down of the air passage.

It is to be noted that the injection of the liquid fuel at a substantially constant pressure, insures at all times a mixture of the same tension, irrespective of the speed of the engine, and irrespective of the richness or leanness of said mixture,- as determined by the adjustment of the screw 36. That is to say, even when the engine is barely turning over, or idling, the liquid fuel for admixture with the air passing valve 4. will be just as finely atomized, or broken. up into providing 41 out of engagement with the spray, as when the engine is running at high speed and drawing in a large volume of mixture.

'I claim,

1. In a device of the character described, an air passage constituting a mixing chamber, means for controlling the flow of air through said passage, a rotating member for the segregation of successive charges of fuel proportional in volume to the flow of air through said passage,- and reciprocating injecting means for projecting said charges successively into said passage.

2. In a device of the character described, an. air passage constituting a mixing chamber, means for controlling the flow of air through said passage, a rotating member chambers for successive charges of fuel to be admitted to said passage, and means for varying the volume of charges admitted to said chambers in proportion to the flow of air through said passage.

8. In a device of the character described, an air passage constituting a mixing chamber, means for controlling the flow of air through said passage, a rotating member providing chambers for successive charges of fuel to be admitted to said passage, means for varying the volume of charges admitted to said chambers in proportion to the flow of air through said passage, and

-reciprocating means for successively projecting the charges from said chambers into said passage.

4. In a device of the character described, an air passage constituting a mixing chamber, means for controlling the flow of air through said passage, a rotating member providing chambers for successive charges of liquid fuel, and means, operable by the rotation of said member, for projecting said charges under constant pressure into said passage.

Dated this seventh day of October, 1914.

, EDWIN Gr. STAUDE.

Witnesses:

A. M. SATHER, D. W. HEITMAN. 

